$(document).ready(function() {

	 $("ul#nav_menu li").mouseover(function() { //When trigger is clicked...

		 //Following events are applied to the subnav itself (moving subnav up and down)
		 $(this).find("ul.nav_menu_sub").slideDown('fast').show(); //Drop down the subnav on click

		 $(this).hover(function() { }, function() {
			 $(this).find("ul.nav_menu_sub").slideUp('normal'); //When the mouse hovers out of the subnav, move it back up
		 });

		 //Following events are applied to the trigger (Hover events for the trigger)
		 }).hover(function() {
			 $(this).addClass("subhover"); //On hover over, add class "subhover"
		 }, function() {	//On Hover Out
			 $(this).removeClass("subhover"); //On hover out, remove class "subhover"
	 });

});